| or optimal management in rice (Oryza sativa L.) the producer must recognize differences in nitrogen (N) use relative to plant type, period of maximum recovery of N, and N losses by the plant. Field studies were conducted using standard-stature and semidwarf cultivars to evaluate dry matter and N accumulation and partitioning, to determine growth stage of maximum recovery of N under a dry-seeded culture system, and to estimate volatile N losses from rice foliage. Dry matter decrease after heading in vegetative tissues was higher with semidwarf 'Lemont' (27%) than with standard-stature 'Lebonnet' (20%). Both cultivars had similar patterns for total N (TN) partitioning at panicle differentiation; however, between heading and heading + 21 days (Hdg + 21D) Lemont showed a continuous N accumulation, but Lebonnet showed either a decline or a leveling. Fertilizer... |
